Four-way valve.



` E. E. MINARD.

FOUR-WAY VALVEl APPLICATION FILED MAII. 14j. IQIB.

1,300,220. Patented Apr. 8,191@

3 SHEETS-SHEET 2- 1n: www.: uns ca. ruowurun. wasumarou. n. a

E. E. MENARD.

FOUR-WAY VALVE.

APPucATloN HLED MAR. 14. ma.

1,300,220. Patient-ed Apr. 8,1919.

3 SHEETS-SHEET 3.

x 'gk UNITED roUn-wAYjvALvE.

` T01 all whom t may concern Be it V`known thatk I, ERNEST -MrisnD,

residing at Detroit, inthe County VofVayne and State of,h[ichiga1i, have inx'ented'.'certain new and useful lmprovementsfin jl5"ourfY Way Valves, ,which the'Y following' is a spec1ication, y reference being had therein to theaccompanying drawings,

In utilizing air under vpressure as a motive.L

fluid, for producing a l'reciprocating Inovemen't of a piston 'iny a cylinder, it is necessary that a valve be employed to acontrollthe desired movement of the piston by permitspeci'eauon ofretter'sratentkl 1 partlybroken away, andvpartly section, j showing )an intermediate positionl oifq'the va citizen of the United StatespofAmerica, valve-wherebythe reservoir is'charged anda.

passagewayL or. connection lis' provided-bee' i tweenf outlet, ports.;r

ting the admissionl and exhaust of the; motive fluid to and fromthe-cylinder in proper.;

sequence and directionj'o lw,"and it is de- T sirable that the vvalve, he compact and `of such design that there' will loe a minimumiwaste ofairin producing afpredetermined' and sometimes 4varying pressure on the -`piston in one direction ofmovenient`v as compared to the pressurein'the opposite directionfof movement. f Y My invention aimsfto providev a pneumatic or four-way valvethat be associatedfwith a workfcylinder for lpositively controlling the use of`airfor other mot1ve fluid in l the cylinder for yshifting Vthfj aws of a chuck or other' device. Thefvalve .is

constructed so that when-opening or closing l e the jaws of a chuck, there is anfinterniediate pressure, particularly when openingjthe jaws, and this air pressures within the' work cylindeif, and

' then 'uribalance' the pressure, thus 'causing f v necessary to show achuck, clutchor'other-- device 'thatthasjawsv `adapted to be shifted by motive Iiiuid, butv have shownin Fig. 11,

the ychuckjaws to open;` A 4 My invention further-:aims to provide la isbrought aboutby equalizing valve of the above type having an auxiliary reservoir and novel means by., whichthe capacity ofthe.v reservoir may fbejincreased' or decreased at will`thus l permitting o :E the 4 valve being usedwith a I notive lunder various pressures. e

My invention will be hereinafter described and then claimed and-:referencewill'rrrow Figure `1 is a front elevationotza valve,

showing vthe same in; a position by which the jaws of a chuck or vother device'aremfain- Fig. 3 is a front elevation of k thejvalva` tion;

of av chu Fig;` ais-"armut 'elevati the rotaryjpOrtiOn v of the valve which Y conshown in. Fig. 5;

Fig. 7

Figli 4 l view of; aportion vof the valve, showing 51,

spring pressed' detent;f

Fig.' 10-'s a rear .elevation valvel- 'l partly 4 broken' away and 1p artly in e section,

showing voir` of the A valve,s andy associated with a ,workcylinderf which is to clampapiece of work or to release the same; The workv cylinder is of a 'conventional form andfmay be vconsidered as having 'chambers A andy B atreaoh,v side of the piston D, -with saidjchambers in communication with' ypipes on otherJ conduits F and G sothat motive fluid, Vas air may beadmitted to `and from' the chambers of the workfc'y-linder. j f Y,

The-valve comprises' a cylindrical station- Varyboly 1 and connected'to ,therear Aface of VAthebody by aplurality of' 1screwib oflts2'or other.,fastening means is acylindrical reser-r,

voir 3-provided with a concentric split'sleeveK ck 'or otherv device. inv an lopen posic ynot the stationl y ary portionoiithe valvefgf- Am A v Flgg 6'is arear'fjelevation of therotary l portion'f'of'thevalve,.showing that face of i .70 yfrontsfthe face of 4thestationary valveas capaoityregulator for the reserf` Y Fig. 11 7is affront, elevation of the valve l f e y @tested Arr'zf, 1919..'

isa longitudinalsectional view of i shown-in lsection with the piston'therein shifted to maintainthe/gjaws ora chuck t lio 4 adapted to be clamped on a' suitablesupport 5 adjacent a chuck or convenient to the operator of a lathe or other machine.

Centrally of the bodyvl is an outwardly extending bolt 6 and rotatable on the outer end of said bolt and against the front face of they stationary body l is a rotary cylindrical valve member 7 provided with a radially disposed handle 8 so that the rotary member may be partially rotated relative to the Stationary body 1. The confronting faces of the member 7 and the body 1 are ground for perfect contact and the rotary member is held against the stationary body 1 so vthat there will be no leak' from between the member and the body.

The face of the body 1f, as shown in Fig.

5, has a plurality of sockets 9 contiguous to the bolt 6 and, as best shown in Figs. 6 and 9` the rotary member 7 has a spring pressed detent adapted to ride into and out of enl gagement with the sockets 9 when the ro- Ytary` member is adjusted relative to the valve body. The detent 10 is employed to hold the rotary member 7 in adjusted p0si-.

tion and when adjusting the rotary member by the handle 8, it is easy to determine'the Y three positions of the rotary member. j The normal .position of the rotary member may Vbe consideredfas that shown inV Figs. 1 and 2, with the handle 8 vertical, and by swinging the handle counterclockwise in an arc of sixty degrees, the intermediate position of the Vrotary member is reached. YThen, byv a further counterclockwise movement of the handley for another' sixty degrees, the third v position of the rotary member is reached.

These various positions will be hereinafter referred to ,after the construction of the valve is better understood.

Again, referring to the valve body l, the side of said body has an air intake port 11 adapted to communicate with a suitable source of motive fluid, as air, Vunder pressure. The inner end ofthe' port 11 is open at the frontface of the valve body, as best shown-in Fig. 5, and is adapted to communicate. with an angle'port '12 inthe rotary member 7. The port 12, as well as another angle port 13 'in the rotary member 7 are formed in two parallel planes, the angle port 12 being adjacent the inner face of the rotary member and the angle port 13 adjacent the outer face thereof, as best shown in member 7, and the ports 16 and e angle port 13 communicates with.

`ports 18, 19 and 20'in the face of the rotary member, the ports 19 what segment shaped.

The stationary valve body 1 has a port 21 and 20 being somev communicating with the reservoir 3, and the ing indicated by arrows in Fig. 1. With the pressure of air shifting the piston D to one end of the cylinder, the chamber B exhausts through the pipe F, port 22, into the angle port 13, and as this port communicates with r the port 24, the chamber B can exhaust. The jaws of the chuck are now maintained closed holding a piece of work.

vTo release the pressure of the jaws of the chuck, the handle 8 is shifted in an arc of sixty degrees, thereby placing the rotary member 7 in the position shown in Fig. 3. The angle port 12 now establishes communication between the supply of air and the reservoir 3, so that said reservoir may be charged through the ports 11, 16, 12, 17 and 21; the passage of air being indicated by arrows in Fig. 3. Simultaneous with this charging of the reservoir, the pressure of air within the chambers A and B of the work cylinder C is equalized by the ports 22 and 23 being placed in communication with each other through the medium of the angle port 13.

To completely open the jaws of theV chuck, the handle 8 is swung to a position one hundred and twenty degrees froml its original position or sixty degrees fromits intermediate position, thus placing the angle ports 12 and 13 in the position shown in Fig. 4. The

' angle port 12 will establish communication between the reservoir 3 and the pipe F, thereby charging the chamberB of the work cylinder C. The angle port 13 will establish communication between the pipe G and the atmospheric port 24, thereby permitting the chamber A to exhaust. rlhe piston D is reciprocated by the pressure of air within the chamber B and the jaws ot the chuck are completely opened.

body and' communicating; therewith, and .an adjustable. valve member Vcarried by said Valve body, said valve member having ports therein constructed and arranged so that air may be admitted directly V.to one Withthe ends 'ofsaid Work cylinder, andv with a main line pressure of air, and an adjustable Valye member carried by said valve bodynand having ports therein constructed and arranged in one vposition of said Valve member to permitairentering one end of said cylinder toshiftfsa'id piston, and eX- haust Vfromtheopposite endV or" said cylinder, in anoth'erpositionto permit of air being stored in a reservoir andequalized atthe sides of said piston, and in another position to permit of `the stored air entering one end ofsaid cylinder and the opposite end thereL of exhausting and wherein ya reservoir chamber Vcarried by the valve body; serves as a container for the l storedair.y

' 9. The combination set forth in claim 8 10. The combination of a Work cylinder, a piston therein, a Valve body communicating With the ends of said Work cylinder and with a main line pressure of air, and an adjustable valve member carried by said valve body and having ports therein constructed and arranged in one position of said valve member to permit air entering one end of said cylinder to shift said piston, and exhaust from the opposite end of said cylinder, and in another position to permit of air being admitted to a reservoir chamber and in the same position permitting the pressure of air in the chambers on each side of said piston to be equalized by communication being established betweenV the said chambers of said Work cylinder, through said Valve body and' said ported adjustable valve member, and in another position permit of air stored in the reservoir chamber to enter at one end of said Work cylinder and the other end to exhaust.

In testimony whereof I atlix my signature in the presence of two Witnesses.

ERNEST E. MIN ARD.

Witnesses:

.KARL H. BUTLER, ANNA M. Donn.

I (2201114285013v thisv patentfmay be obtanedfor five cents each, by addressingr the Commissioner of Patents,

' Washington, D. C. 

